There's usually someone who falls, the question is just who? For example, I'm really not very high on Deni Avdija but most places have him projected between 5 and 10. If he 'falls' to 13 and we take him, that would technically be a consensus top 10 pick falling to us, but I would not value it very highly; I'd rather have Maxey, for example.
24 is a solid spot to be I think because if you've done your scouting homework you know that there are a bunch of guys in that area who aren't ever going to be stars but who are likely to be good NBA players: if you're not trading the pick then at 24 that's what you should be looking for. The likely stars and the guys with nuclear upside are almost always gone by then, and if you're taking swings at players outside of the top 20 then odds are that you're just grabbing fringe NBA players and hoping they can suddenly figure out a million things, which is unlikely. Someone like Bane or Flynn or Tillman should be available around there and then you grab them and you take it as good value, rather than trying to outsmart yourself.
Still think our pick at #39 should be Sam Merrill unless someone like Flynn falls dramatically.